<form action="javascript:alert('unaffected');">Ignored</form>
<form action="about:invalid#TemplFailedSanitizationURL">Sanitized</form>
<form action="javascript:alert(&#39;should not be sanitized&#39;)">
	Unsanitized
</form>
<form action="javascript:alert(&#39;should not be sanitized&#39;)">
	with error unsanitized
</form>
<form action="about:invalid#TemplFailedSanitizationURL">
	with error sanitized
</form>
